A spring self-locking mechanism for pressure switch

Abstract

The present invention discloses a spring self-locking mechanism for a pressure switch, comprising a spring mechanism and a middle cylinder, a reciprocating assembly and a shell of a semi-enclosed structure that slide and fit from the inside to the outside in sequence, the upper and lower sides of the reciprocating assembly are respectively provided with self-locking columns, the upper and lower sides of the shell are respectively provided with corresponding locks for rotation, the upper and lower sides of the middle cylinder and the positions located outside the locks are respectively provided with joysticks and guide columns, the joysticks and guide columns respectively pass through the reciprocating assembly and the shell, and are movably connected with the reciprocating assembly and the shell in the vertical direction to abut against the locks; the locks are connected with the shell through a return spring sheet; the self-locking columns are slidably connected with the shell in the vertical direction. The present invention has the characteristics of rapid action and sudden displacement change, which can improve the speed of the pressure switch being turned on and off, and avoid the problem of contact ablation caused by too small contact gap of the pressure switch and repeated connection and disconnection of the pressure switch in a vibration environment.

Description

Technical Field

[0001] The invention belongs to the technical field of spring self-locking devices, and in particular relates to a spring self-locking mechanism for a pressure switch. Background Art

[0002] At present, the pressure switches widely used in aviation, aerospace and related fields are mainly of diaphragm box type and corrugated diaphragm type structures. The pressure switches with existing structures can be made into smaller volumes, but the closing and opening of the contacts are relatively slow, which is easy to generate sparks and arcs, causing the contacts of the pressure switch to burn. The performance is more obvious in a vibration environment, which seriously affects the reliability and life of the pressure switch. Moreover, when the pressure value changes near the rated starting pressure value, the contacts will repeatedly close and open, and the pressure signal device will send out a false alarm signal. If the rear end of the pressure switch is connected to an inductive load, there will be an induced electromotive force at the moment the contacts are disconnected, which will accelerate the burning of the contact points. As the application environment of pressure switches becomes more and more complex, there are many problems with the current principle of pressure switches. Summary of the invention

[0003] The object of the present invention is to provide a spring self-locking mechanism for a pressure switch, which can realize rapid switch action, self-locking state and high reliability.

[0004] The present invention is mainly realized through the following technical scheme: a bouncing self-locking mechanism for a pressure switch, comprising a bouncing mechanism and a middle cylinder, a reciprocating assembly and a shell of a semi-closed structure that are slidably mounted from the inside to the outside in sequence, the upper and lower sides of the reciprocating assembly are respectively provided with self-locking columns, the upper and lower sides of the shell are respectively provided with corresponding rotation locks, the upper and lower sides of the middle cylinder and the positions located outside the locks are respectively provided with operating rods and guide columns, the operating rods and guide columns respectively pass through the reciprocating assembly and the shell, and are movably connected with the reciprocating assembly and the shell in the vertical direction to abut against the locks; the locks are connected to the shell through a return spring sheet; the self-locking column is slidably connected to the shell in the vertical direction.

[0005] In order to better implement the present invention, further, the shell is provided with through locking grooves corresponding to the self-locking columns on the upper and lower sides, and waist-shaped grooves are provided on both sides of the locking groove corresponding to the joystick.

[0006] In order to better implement the present invention, further, waist-shaped grooves and U-shaped grooves of a semi-enclosed structure are respectively provided on the upper and lower sides of the reciprocating assembly corresponding to the joysticks.

[0007] In order to better implement the present invention, further, a rivet is provided on the shell, and the lock is rotatably provided on the shell with the rivet as an axis.

[0008] In order to better realize the present invention, further, the bouncing mechanism includes a slide groove, a slider, and a spring. The middle tube and the two sides of the reciprocating component are respectively provided with slide grooves, and the interior of the middle tube is provided with an installation cavity. The two sides of the installation cavity are respectively provided with sliders, and a spring is provided between adjacent sliders. The two ends of the slider are respectively slidably connected with the slide grooves on both sides of the middle tube and the reciprocating component.

[0009] In order to better implement the present invention, further, the bouncing mechanism also includes a pin, which is laterally inserted into the slider, and the two ends of the pin are respectively slidably connected to the slide grooves on both sides of the middle tube and the reciprocating component.

[0010] In order to better realize the present invention, further, one end of the reciprocating assembly is connected to the contact mechanism of the pressure switch, and the middle cylinder is used to transmit the displacement signal of the pressure switch, driving the joystick to reciprocate, thereby triggering the self-locking and unlocking state switching of the two locks.

[0011] During use of the present invention, the reciprocating assembly is inserted into the housing through the opening of the housing. The latch is rotatably arranged on the housing, and a restoring force is provided to the latch by a return spring. The reciprocating assembly locked by the latch is connected to the contact mechanism of the pressure switch, and the middle cylinder transmits the displacement signal of the pressure switch, and the displacement drives the joystick and the columnar structure on the middle cylinder to reciprocate, triggering the switching of the self-locking and unlocking states of the two latches.

[0012] When the middle cylinder receives the displacement movement of the pressure switch, the pin on one side fixes the position of the slider, and the slider on the other side compresses the spring. When one latch releases the reciprocating assembly, the spring force drives the reciprocating assembly to quickly bounce and switch the contact state of the pressure switch, while the other latch fixes the reciprocating assembly in the position after the movement, realizing the rapid switching and self-locking of the contact state of the pressure switch. The joystick and the middle cylinder are assembled and fixed by riveting first and then laser spot welding to ensure that the position of the joystick is stable and reliable.

[0013] Beneficial effects of the present invention:

[0014] (1) The present invention has the characteristics of rapid action and sudden displacement change, which can improve the speed of connecting and disconnecting the pressure switch, and avoid the problem of contact ablation caused by too small contact gap of the pressure switch and repeated connection and disconnection of the pressure switch in a vibrating environment.

[0015] (2) The present invention adopts a self-locking structure design. External vibrations and pressure fluctuations will not change the contact state of the pressure switch. Only when the mechanism reaches the unlocked position will the reciprocating component in the mechanism change the output state of the pressure switch, thus avoiding the malfunction of the traditional pressure switch caused by external environmental interference.

[0016] (3) The present invention is designed as an all-metal structure. In each self-locking state, there are no moving parts in the structure. The pressure signal device designed using this structure has a stable structure, a fast self-locking function, and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 The main view;

[0019] Figure 3 A cross-sectional view of the internal structure of the spring self-locking mechanism;

[0020] Figure 4 It is a schematic diagram of the connection structure between the middle cylinder and the reciprocating assembly;

[0021] Figure 5 for Figure 4 sectional view of .

[0022] Among them: 1. Shell, 2. Rivet, 3. Lock, 4. Return spring sheet, 5. Reciprocating assembly, 6. Middle cylinder, 7. Slider, 8. Spring, 9. Pin, 10. Joystick, 11- Slide slot. DETAILED DESCRIPTION

[0023] Embodiment 1:

[0024] A spring self-locking mechanism for a pressure switch, such as Figure 1-Figure 3 As shown, it includes a bouncing mechanism and a middle cylinder 6, a reciprocating component 5 and a shell 1 with a semi-enclosed structure that are slidably mounted from the inside to the outside in sequence, the upper and lower sides of the reciprocating component 5 are respectively provided with self-locking columns, the upper and lower sides of the shell 1 are respectively provided with corresponding rotation locks 3, the upper and lower sides of the middle cylinder 6 and the positions located outside the locks 3 are respectively provided with operating rods 10 and guide columns, the operating rods 10 and guide columns respectively pass through the reciprocating component 5 and the shell 1, and are movably connected with the reciprocating component 5 and the shell 1 in the vertical direction to abut against the locks 3; the locks 3 are connected to the shell 1 through a return spring sheet 4; the self-locking column is slidably connected with the shell 1 in the vertical direction.

[0025] During use of the present invention, the latch 3 is rotatably arranged on the housing 1, and a restoring force is provided to the latch 3 by a return spring 8. The reciprocating assembly 5 locked by the latch 3 is connected to the contact mechanism of the pressure switch, and the middle cylinder 6 transmits the displacement signal of the pressure switch, and the displacement drives the joystick 10 and the columnar structure on the middle cylinder 6 to reciprocate, triggering the switching of the self-locking and unlocking states of the two latches 3.

[0026] The displacement of the pressure switch will drive the middle cylinder 6 to move, driving the joystick 10, so that one latch 3 releases the initial position of the reciprocating assembly 5, and the other latch 3 fixes the reciprocating assembly 5 in the moved position. The movement of the reciprocating assembly 5 also switches the position of the pressure switch contacts in the snap action. Removing the pressure will restore the reciprocating assembly 5 to its initial state and return the contacts to the initial position in the snap action. The latch 3 is now reset to the initial position.

[0027] Embodiment 2:

[0028] This embodiment is optimized based on embodiment 1. Figure 1 , Figure 2 As shown, the self-locking columns on the upper and lower sides of the housing 1 are provided with through lock slots, and waist-shaped slots are provided on both sides of the lock slots corresponding to the operating rod 10. The upper and lower sides of the reciprocating assembly 5 are provided with waist-shaped slots and U-shaped slots of a semi-enclosed structure corresponding to the operating rod 10. The housing 1 is provided with a rivet 2, and the latch 3 is rotatably provided on the housing 1 with the rivet 2 as the axis.

[0029] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0030] Embodiment 3:

[0031] This embodiment is optimized based on embodiment 1 or 2. Figure 3-5 As shown, the bouncing mechanism includes a slide groove 11, a slider 7, a spring 8, and a rivet 2. The middle cylinder 6 and the two sides of the reciprocating component 5 are respectively provided with slide grooves 11. The middle cylinder 6 is provided with a mounting cavity inside, and sliders 7 are respectively provided on both sides of the mounting cavity. A spring 8 is provided between adjacent sliders 7. The pin 9 is laterally inserted into the slider 7, and the two ends of the pin 9 are respectively slidably connected with the slide grooves 11 on both sides of the middle cylinder 6 and the reciprocating component 5.

[0032] like Figure 5 As shown, when the middle cylinder 6 receives the displacement movement of the pressure switch, the pin 9 on one side fixes the position of the slider 7, and the slider 7 on the other side compresses the spring 8. When one latch 3 releases the reciprocating assembly 5, the elastic force of the spring 8 drives the reciprocating assembly 5 to bounce quickly to switch the contact state of the pressure switch. At the same time, the other latch 3 fixes the reciprocating assembly 5 in the moved position, thereby realizing the rapid switching and self-locking of the contact state of the pressure switch.

[0033] During the use of the present invention, after the middle cylinder 6 penetrates the inner cavity of the reciprocating assembly 5, the joystick 10, the slider 7, the spring 8 and the pin 9 are assembled. The middle cylinder 6 and the reciprocating assembly 5 are processed with a slide groove 11 of the same size. When the middle cylinder 6 moves, the slider 7 and the pin 9 on one side will compress the spring 8. At this time, the reciprocating assembly 5 is fixed by the lock 3 and does not move. During this process, the contact state of the pressure switch is always in a stable state until the joystick 10 drives the lock 3 on one side to unlock. The reciprocating assembly 5 will quickly switch the contact state of the pressure switch under the action of the elastic force of the spring 8. At the same time, the lock 3 on the other side locks the reciprocating assembly 5 in this state, and continues to maintain the stability of the pressure switch contact in this state, realizing the core functions of the mechanism of rapid action and self-locking.

[0034] The other parts of this embodiment are the same as those of the above-mentioned embodiment 1 or 2, and thus will not be described in detail.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A spring self-locking mechanism for a pressure switch, characterized in that: The invention comprises a spring mechanism, a middle cylinder (6) which is slidably mounted from the inside to the outside, a reciprocating assembly (5), and a shell (1) of a semi-enclosed structure, wherein the upper and lower sides of the reciprocating assembly (5) are respectively provided with self-locking columns, and the upper and lower sides of the shell (1) are respectively provided with corresponding locking bolts (3) for rotation, and the upper and lower sides of the middle cylinder (6) and the positions outside the locking bolts (3) are respectively provided with operating rods (10) and guide columns, and the operating rods (10) and guide columns respectively pass through the reciprocating assembly (5) and the shell (1) and are movably connected to the reciprocating assembly (5) and the shell (1) in a vertical direction so as to abut against the locking bolts (3); the locking bolts (3) are connected to the shell (1) via a return spring sheet (4); and the self-locking columns are slidably connected to the shell (1) in a vertical direction; The bouncing mechanism comprises a slide groove (11), a slider (7), and a spring (8); the slide grooves (11) are respectively arranged on both sides of the middle tube (6) and the reciprocating assembly (5); a mounting cavity is arranged inside the middle tube (6); sliders (7) are respectively arranged on both sides of the mounting cavity; a spring (8) is arranged between adjacent sliders (7); and the two ends of the slider (7) are respectively slidably connected to the slide grooves (11) on both sides of the middle tube (6) and the reciprocating assembly (5); The bouncing mechanism further comprises a pin (9), the pin (9) being inserted into the slider (7) in a transverse direction, and the two ends of the pin (9) being respectively slidably connected to the middle tube (6) and the slide grooves (11) on both sides of the reciprocating assembly (5); The middle cylinder (6) and the reciprocating assembly (5) are machined with sliding grooves (11) of the same size.

2. A spring self-locking mechanism for a pressure switch according to claim 1, characterized in that: The housing (1) is provided with through locking grooves corresponding to the self-locking columns on the upper and lower sides, and waist-shaped grooves are provided on both sides of the locking groove corresponding to the operating rod (10).

3. A spring self-locking mechanism for a pressure switch according to claim 2, characterized in that: The upper and lower sides of the reciprocating assembly (5) are respectively provided with a waist-shaped groove and a U-shaped groove with a semi-closed structure corresponding to the operating rod (10).

4. A spring self-locking mechanism for a pressure switch according to claim 1, characterized in that: The housing (1) is provided with a rivet (2), and the latch (3) is rotatably arranged on the housing (1) with the rivet (2) as an axis.

5. A spring self-locking mechanism for a pressure switch according to claim 1, characterized in that: One end of the reciprocating assembly (5) is connected to the contact mechanism of the pressure switch, and the middle cylinder (6) is used to transmit the displacement signal of the pressure switch to drive the joystick (10) to reciprocate, thereby triggering the self-locking and unlocking state switching of the two latches (3).

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